Question

A wire has a current that flows to the right.Which describes the magnetic field produced by the current?

a.straight lines along the wire to the rightB. straight lines along the wire to the leftC. circles around the wire that go in at the topD. circles around the wire that go in at the bottom

Answer 1

D-circles around the wire that go in at the bottom

Step-by-step explanation:

In order to determine the direction of the magnetic field around the wire, we should use the right's hand rule. First of all, let's keep in mind that the magnetic field around a current carrying wire consists of concentric circles around the wire, so the only possible options are C and D.

In the right-hand rule, we put our thumb in the same direction of the current (so, toward the right). Then we wrap all the other fingers of the hand around the thumb: the direction of the fingers give the direction of the magnetic field. In this case, the fingers go in at the bottom of the thumb (bottom of the wire), so the correct option is

D. circles around the wire that go in at the bottom

Answer 2

magnetic field near any point of wire is given by right hand thumb rule

As per right hand thumb rule if we put our thumb along the current in the wire then magnetic field will always along the curl of fingers.

So magnetic field lines will always forms closed loop around the wire.

As per right hand rule we can say the magnetic field will be

D. circles around the wire that go in at the bottom